//import java.util.Scanner;
//
//public class Circle {
//    public double radius;
//    public Point center;
//
//    //设置半径
//    public void setRadius(double radius) {
//        this.radius = radius;
//    }
//
//    public static void main(String[] args) {
//        Scanner in = new Scanner(System.in);
//        Circle circle = new Circle();
//        //设置半径
//        System.out.println("输入半径");
//        circle.setRadius(in.nextDouble());
//        System.out.println("该圆的面积为" + circle.getArea());
//        //设置圆心
//        circle.center.x = 1;
//        circle.center.y = 1;
//        //设置坐标
//        System.out.println("输入要查询的点");
//        Point point = new Point(in.nextDouble(), in.nextDouble());
//        //circle.point_in_circle(circle,point);
//        System.out.println(circle.point_in_circle(circle, point));
//    }
//
//    //计算面积
//    public double getArea() {
//        return 3.14 * radius * radius;
//    }
//
//    //判断该点是否在圆内
//    public boolean point_in_circle(Circle circle, Point point) {
//        return Math.sqrt(Math.pow(circle.center.x - point.x, 2) + Math.pow(circle.center.y - point.y, 2)) <= circle.radius;
//    }
//}